1. Click File > Prepare > Model Properties. The Model Properties dialog box opens.

2. Click change in the Material line. The Materials dialog box opens.

3. Select the material in the Materials in Library or Materials in Model list and click Edit > Properties. The Material Definition dialog box opens.

4. Click the Appearances tab and select the appearance that you want to modify.

5. Click Edit. The Material Appearance Editor dialog box opens displaying the selected appearance.

6. Modify the appearance.

7. If you have selected a material in the Materials in Library list, then Save to Library becomes available. To save the material to the library, perform the following steps.

a. Click Save to Library. The Save a Copy dialog box opens.

b. Browse to the material library directory and click OK. If you have added or edited appearances, then the Save dialog box also opens.

c. Click OK. By default, the appearances are saved in a file named global.dmt in the same location where the material file is saved or in the location defined by the global_appearance_file configuration option.

8. If you have selected a material in the Materials in Model list, click OK in the Material Definition dialog box. The Material Definition dialog box closes and you are taken back to the Materials dialog box.